Move to API some properties, and remove default true of `immediate`
Move to API some properties, and remove default true of `immediate`

Note: labels measurements are shown regardless of the value of the
`immediate` property, so uses default of OL Measure control.

marcjansen/OL-DynamicMeasure,neogis-de/OL-DynamicMeasure,jorix/OL-DynamicMeasure,neogis-de/OL-DynamicMeasure,marcjansen/OL-DynamicMeasure